Hot-air furnace



' M. l. OTTO.

HOT AIR FURNACE.

APPLICATION FILED OCT. 1, 1919.;

1,380,734. Patented June 7, 1921.

INVENTOR! ATTORNEY.

MAXIMILIAN J. OTTO, OF NEW YORK, N. Y.

HOT-AIR FURNACE.

Application filed October 1, 1919.

naces, of which the following is a description.

This invention has reference to hot air stoves or furnaces and,particularly, to stoves adapted to give heat through the medium of gasor oil, and convey the same to either the floors above or to radiate itsheat in the room in which the stove stands through the medium of longlengths of heat conducting pipes.

Among the objects of my invention may be noted the following: to providemeans by which hot air generated in a small, cylindrical gas or oilstove may be conveyed to, and distributed in, one or more rooms abovethat in which the heater stands and at the same time have the hot airgenerated tempered by moisture commingled with the hot air and reducedby the latter to a gaseous, invisible fluid; to provide means by whichhot air, generated in a gas or other fuel burner, may be conveyed todifferent parts of the room in which the heater stands and tempered bythe admixture with the hot air of a moist vapor; to provide means bywhich a hot air furnace may produce its own moisture-laden heat andconduct the samev to distantpoints, as may be required; and to provide asimple, economical, cheaply constructed, eflicacious device by means ofwhich the foregoing objects may be accomplished,

together with others-which will be pointed out during the course of thisdescription.

In order that my invention may be clearly understood, I have provideddrawings wherein:

Figure 1 is a sectional elevation of a hot' air stove or furnaceconstructed and disposed in accordance with my invention; and Flg. 2 isan elevation showing, a structure wherein the heat generated may beradiated 7 into the room in which the heater stands and at the same timedistributed to distant points in the same room throughthe medium ofradiatingpipes or coils, the latter being broken at several points owingto the limita-' tions of th sheet. 7

Referring to the drawings, the numeral 1,

in Fig. 1, indicates the floor of a room or cel a n which the he er m ye s t r Specification of Letters Patent.

erected, 2 being the ceiling, and also the floor of one or more roomsabove, in which registers or radiators, conventionally shown at 3, maybe set in any suitable manner for the purpose of conveying the heatdirectly to the room or rooms above. The small heater, the cylindricalcasing of which is indicated by 4, may be of any acceptable or suitabletype, such as, for example, that shown in my Patent No. 1,312,804,granted Aug. 12, 1919, and in which heat conducting tubes 5 are locatedto convey the heat from the burner 6 directly to a chamber 7. Thecylindrical casing 4 may be perforated or provided with openings 8, inorder that the heat generated by the burner may, in some measure, beradiated intothe room in which the heater stands. The heating medium, orcoil 6, may be a gas burner or oil burner; but, in the instance shown,it is a gas burner of the type shown in my said patent connected to asource of supply by the pipe 9, the supply to the stove being controlledby the cook 10. At the bottom of the cylindrical casing 4, a perforatedheating plate 11 is provided through which the heat from the burner mayenter the casing and be radiated from the latter into the room in whichthe stove stands, and the heat from the burner is also conveyed directlythrough the tubes 5 into the chamber 7 above. The chamber 7'is providedin a frusto-conical casing or base 13v rests upon an outturned flange 15at the top of the casing 4, thus giving a solid and substantial seat andconnection H between the hot air drum 12 and the cylindrical casing 4;but, it will be understood that the hot air drum 12 can readily belifted and removed from the cylindrical casing 4, when desired. Thecylindrical ca ing, at the top of the tubes 5, is provided with aperforated diaphragm 16 through which the heat from the casing 4 mayalso enter the chamber, and which aids in supporting the tubes. 4

The drum 12 is apertured at a plurality of polnts near its top, in whichare set heat conducting pipes 1'7 extended in any suitable direction,but preferably alwaystending upwardly, to connect with the radiators 3.At some point in the pipes 17, dampers 18 are provided, preferablylocated as shown, for reason presently described. The top Luz:

of the drum 12 is perforated,-as at 19, and below the same is providedwith a damper also correspondingly perforated, said damper being adaptedto rest upon the flange or collar 21 and to be shifted circularly toclose or open the apertures extending through the same and the top ofthe drum 12, so as to control the passage of the heat in the chamber 7to the bottom of the steam or water boiler 22, which is adapted to seton the top of the drum 12 and have the water therein heated to producesteam. A heavy cover 23 is applied to the steam boiler or chest, and thelatter, near its top, is provided with outlet pipes 24 connected bysliding sleeve couplings 25 to short pipes 26 tapped into the pipes 17.The dampers 18 are preferably located above the point of generation andadmission of steam, since, when the heat is cut oil and steaming maycontinue, the steam should be cut off from the radiators by turning thedampers 18.

From the foregoing description, it will be seen. that my hot air furnacecomprises an ordinary, small, sheet-iron, cylindrical heater, such as isusually used for oil or gas burners, and which is por'able and seldommore that 2'}- feet high and 12'to 18 inches in diameter, and myinvention consists in the adaptation of such a heater or burner to theheating of large rooms or spaces as set forth above and shown in Fig. 1in an economical, rapid, effective manner, and

without the usual accompaniment of stationary hot air furnaces, such asdust, dirt, soot and dry air, and I have found that my small cylindricalheater covered by my aforesaid patent, when combined with the meansshown in Fig. 1, as well as in Fig. 2, produces an exceedingly effectivefurnace which will thoroughly heat not only the room in which it stands,but one or more rooms above or adjacent the same, and by combining asteam drum or tank therewith and connecting the same to the hot airflues, the air is moistened quite effectively, thus eliminating theobjection to the usual hot air furnaces, which produce dry, vitiated airwhich is quite objectionable from many standpoints, as is well known.

In Fig. 2, I have shown an embodiment of my invention adapted forheating very cffectively unusually large rooms, even to the far corners,as may be desired. In this embodiment of my invention, thecylindricalheater or casing 27 may be of unperforated sheet iron, the heat fromwhich will radiate into the room in which the heater stands. The hot airdrum or chamber 12 has a plurality of pipes 17 connected therewith, and.

said pipes areconnected with pipe extensions or coils 28, which may beas extensive as desired and carried to any point or position' in theroom. The heater is shown as set, for example, in a hearth or lire-place29, and a part of the pipe or coil 28 is shown as coupled with anextension 30 tapped into the chimney, as at 31. The other features ofthe furnace are the same as in Fig. 1, and such features arerespectively, indicated by like numerals. With this embodiment of myinvention, i am able to extend the coils or pipes 28 into any part ofthe room in which the heater stands or in the rooms above, if desired,thus effectively heating said rooms even to the far corners.

It will be readily understood that, when the steamer is not required, itmay be disconnected by sliding the couplings 25 to one side so as torelease the pipes 24, or the reverse so as to release the pipes 27, andthe steamer may then be lifted from the drum 12. On the other hand, whenit is desired to eliminate the steaming feature or reduce the quantityof the same, the damper 20 may be closed. the heat from any of the pipes17, this may be done by closing the dampers 18.

Having thus described my inventiomwhat I claim and desire to secure byLetters Patent is:

1. A hot air furnace comprising a cylindrical heating member havingmounted thereon a hot air drum; means for generating heat at or near thebottom of the said"v member; means for conveying the heat to the hot airdrum; a steam drum mounted on the hot air drum; a damper interposedbetween the steam drum and the hot air drum; conduits extending from thehotair drum; conduits extending from the steam drum; and means forcoupling the two conduits, whereby thehot air from the air drum and thesteam from the steam drum may be commingled and distributed.

2. A hot air furnace consisting of a cylindrical casing; a source ofheat arranged at the bottom of the casing; a drum or chamber mounted onthe top of the casing; a plurality of heat conveying tubes extendingbetween the source. of heat and the drum; a plurality of conduits tappedinto the, drum for conveying the heatthereof to distant points; a,steam. drum mounted onthe hot air drum; a coupling extending from saidsteam drum to the hot air conduits whereby tomix steam with the hot:air'emanating from the hot air drum; meanswhereby the steam drum may bedemounted from the hot air drum; and means whereby the said 7 couplingmay be detached.v .MAXIMILIAN J. OTTO.

When it is desired to cut off p

